#define _CRT_SECURE_NO_WARNINGS

#include<stdio.h>

int main()
{
	char killer = 0;
	for(killer='A'; killer <= 'D'; killer++)
	{
		if ((killer != 'A') + (killer == 'C') + (killer == 'D') + (killer != 'D') == 3)
		{
			printf("killer is %c", killer);
		}
	}
	return 0;
}